Maybe you didn't heard about everything This soft is not released for everyone,it is used by the top players in QQ to check if others cheats so they avoid playing them (no ban from QQ you know) .It is like XGS,wasn't released until the admins decided it to max its effectivity.Let's wait and see,who knows..

there was an anti-cheat client (not on QQ as far as i know you) but on the older chinese server that was like XWIS (skill wise)

you had to run your game with it, and at the start you'd have some chinese letters and a version number, it wouldn't let third party tools work, or something like that.
Either way it used to be available so there is a high probability it still might be

I'm sorry！it seems to be a rumor！
There was a platform in China，it named “Hudong”, not QQ.
This platform was running the anti-cheat patch of ra2 .
but when the trainers upgraded, it soon lost its role.
Because of some reasons ，This platform was closed for a long time.Now it works again.
It intends to make a new anti-cheat patch.But there are a lot of difficulties.
At present, almost no one plays ra2 in this platform. Most of them are still in QQ.
So the new anti-cheat patch is too difficult to be produced.
If this happens, I will publish it here In the first time.